30-year-old Rin Sakuma, who works at an event management firm reunites with her old flame, Kotaro Irie, on the site of a new project she is leading. He's now heading a security company, but he's actually the son of a Yakuza and the last person on Earth she wanted to meet again after their bad breakup back in high school. And to rub salt in the wound... He has grown to be an even more fit and suave man. She soon realizes her feelings for him have not disappeared and attempts to hide them by putting on a distant attitude... But that all goes to waste when he pulls her in for a...kiss?! It turns deeper and deeper until... He is on top of her and about to go even further...?! Is this all just a yearning for the past or is it so much more? Whatever the case, his fingers haven't forgotten where she likes to be caressed.